Rotary oven



` G. F. SMHH. ROTARY OVEN. AIIFI'ICATION- Fl-LE APR. Il. '|921'.

1,401,824, 2 Patmed De.27, 1921'.

' la SHEETS-SHEET l.

G. F. SMITH.

ROTARY OVEN.

APPLICATION FILED APR. Il, 192|. y 1,401,824. Patented Deu. 27, 1921.

l v a SHEETS-SHEET 2.

J1/wanton G. F. SMITH.

ROTARY OVEN.

APPucATloN FILED APR. 11. 192|.

1,401,824. Patented Deu. 27, 1921,

. 3 SHEETS-SHEET 3- ;:1 1-

@brow m n supports the top.

' GEORGE SMETH', 0F BALTMORE, MARYLAND.

ROTARY OVEN.

Specification of Letters Patent. Patented D80. 27, 1921.

Application filed 'April 11, 1921. Serial No. 460,197.

To all whom t may concern.'

Be it known that I, Gnonon F. SMITH, a citizen of the United States, residing at Baltimore, in the ycounty -of Baltimore City, and State of Maryland, have invented certain new and useful Improvements in Rotary Ovens; and do declare the following to be a full, clear and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. l

This invention relates to an improved bakers oven and has special reference to a rotary turn-table positioned in the bakers oven and provided with a vertically extending shaft which extends through the top of the oven and has its upper end secured in the upper section of a bearing which supports and rotatably mounts the shaft thus permitting thev shaft and turn-table to be rotated when the upperl section of the bearing is rotated by actuating means.

Another object lof the invention is to provide an improved type of turn-table having a spider constructionprovided with improved arms and cross bars, the arms and cross bars vbeing interlocked and havin@ their u er faces tlush'so that the top ofthe turn-table which is formed of slabs of soapstone or other suitable material may restv flat upon the spider.

l Another object ofthe invention is to sov construct this spider that the radiating arms and cross bars of the same may be easily put together or taken apart and further so constructed that they will be firmly held inthe Y proper position when set up.

Another object of the invention is to so construct the top of the table that the slabs forming the same may belarranged in concentric circles and provide radiating rows of slabs which have their inner and outer and side edges meeting in contacting relation and ytheir edge portions resting upon the radiating arms and cross bars of the spider which This improved oven construction is illus front elevation. y

Fig. 2 is a vertical transverse sectional view through the oven taken along the line of Fig. 3.

trated inthe accompanying drawings, where' Figure 1 is a view showing the oven in v Fig. 3 is a vertical longitudinal sectional view taken along the line 3-3 of Fig..1.

Fig. l is a vertical transverse sectional `view .taken along the line 4 4 of Fig. 3.

Fig. 5 is a horizontal sectional view, taken along Vthe linea-45 of Fig. 3.

Fig. 6 is van enlarged fragmentary view of the turn-table showing the same in top plan.

Fig. 7 is a topy plan view of one of theradiating arms of the spider forming al portion of the turn-table. .y

Fig. 8 is a side elevation of the arms disclosed in Fig. 7.

Fig. 9 is an enlarged transverse sectional rlhis turn-table has been shown in connecf i tion with an oven having a construction very similar to that disclosed in connection with the oo pending application, Serial No. 460,195, filed April 11, 1921. Since the speciflc construction of the body portion of the oven is described in detail in the application referred to, it will only be described briefly as follows.

This oven is provided with a combustion chamber 1 above the fire boX and grate 2 and above the combustion chamber there lis pro-L vided a baking chamber. The products of combustion passfrom the combustion chamber through tlues e into manifolds 5 and from these manifolds pass through lpipes 6 into soot pockets 7 from which they pass through pipes 8 into manifolds 9. From themanii folds 9, the products of combustion pass into the-fines 10 of a conduit 11 and theninto the 4chimney 12. The flues 10 are formed in the conduit 11 by providing a dividing wall 13.

'lhe walls of the oven are thickened for the ,depth of the baking chamber 3 as shownin Fig. 5 thereby providing a baking chamber which will'be circular. 4.

A. turn-table is to be positioned in the baking chamber and in order to mountthe same, there has been provided cross beams 14 which are `preferably I-beams and carry a Vthrust bearingfl to receive the lower end of :avertically disposed shaft 16. This shaft Cir 1G extends through the wall 13 and top of the eonduit 11 through the upper and lower members 17 and 18 of a bearing which is supported by cross beams 19. r l he upper bearmember 17 will be securely lockedupon the upper end portion of the shaft 16 and is provided with a bevel gear 20 which meshes with a bevel gear or pinion 21 carried by an actuating shaft 22. rlhis actuating shaft is rotatably mounted in bearings 23 carried by the l-beams 19 and this shaft 22 extends through the forward wall of the oven and is provided with a hand wheel 24 by means of which'the shaft 22 may be rotated when it is desired to rotate the shaft 16.

A spider is carried by this shaft 1f adjacent its lower end and within the baking chamber and is provided with a disk 25 which forms a hub and is locked upon the shaft 16 just above the bearing 15 so that when the shaft 16 rotates, this hub or disk will also rotate. rEhe upper face of the disk is cut out thus providing upstanding concentric rings having openings 26 form-ed therein to receive fastener bolts 27 which also extend through sockets 28 formed in the inner end portions of the depending` ribs 29 of the radiating arms 30. These arms 30 are T-shaped in cross section as shown in ll 9 and the depending ribs 29 thereof have their inner end portions cut away so that each arm will have its rib provided with an abutment shoulder 31 for engaging lthe outer periphery of the disk 25. Each arm is further provided with an upstanding abutment lip 32 at its outer end and intermediate its length will be provided with counter-sunk seats 33. l? rom an inspect-ion of rigs. 6 and T, it will seen that each of the seats is formed with its end portions converging toward the outer end of the arm so that the end portions of the cross bars Se); may nt into the end portions of these seats with their ends meeting in end to end Contact as shown clearly in Fig. 6. it will furthery noted that the cross bars when in place will have their unper faces flush with the upper faces of the radiating arms thereby providing a spider having a smooth upper face. Each of these cross bars is provided with a depending rib 35 terminating short of the ends of the cross and adapted' to engage the side edges ot the radiating arms. rlhe cross bars wi therefore be prevented from moving longi dinall of the radiating arms and the cross bars will serve to prevent the radiating arms from having any tendency toward moving toward each othe'nx rthe top of this turn-table is formed of slabs of soanstone or other suitable material. The two inne. slabs 36 are semi-circular so that they Ymay be set about the shaft 16 and rest upon the inner ends or" the radiating arms above the hub disk 25. rlhe remain- Leonesa ing slabs will each be in the form of a porpositioned about the central slabs 36.

These slabs which ferm the rings 3?, 38

a i9 will further be of such size 'that when in piace', they will just cover the spaces between the radiating arms and cross bars with their edge portions resting upon the arms and cross bars and meeting in edge-to-edge Contact. 'l` he upstanding abutment lips 32 the ends of the radiating arms engage the outer slabs and the slabs will thus be securely held in place and prevented froin having any tendency to move apart.

lt will thus be seen that-there has been provided yturn-table which is so constructed that it may be mounted upon the shaft 16 and lit compactly in the lower portion of the baking chamber where it will take up a small amount of room and be positioned with its upper face approximately level with the lower edge of the door-way@ through which articles are inserted and removed. it is desired to take the turn-table apart for the purpose of inaking rei. irs or for cleaning the Ybaking chamber easily done by simply removing the slabs and cross and then releasing the Securing bolts 37 so that the radiating armsV can be removed from the hub disk. rlhe turn-table can be readily reassembled when desired. Y

lclaim:

1. A turn-table for a bakers oven, said table eomprising a rotatable shaft, a hub element carried thereby, radiating arms carried by the hub, said arms being provided in their upper faces with transversely extending ivf-shaped grooves forming countersunk seats, cross bars extending between the arms and having their ends tting into the seats and meeting in end to end oo ntact, and a top resting upon the'arms and cross bars.

2. fr turn-table for a bakers oven, said i sing a rotatable shaft, aY disk cured upon said shaft, radiating, arms depending webs and having their ner port-ions overlapping the disk and '-ul to utment shoulders engaging beneath the turn-table, this can be rotatable shaft extending vertically.

upon the lower end portion of said shaft, having depending ribs engaging thev sides arms secured to said disk and extending in of said arms to hold the arms against transdiverging relation, each arm being T-lshaped verse movement, and a top carried by the in cross section and having transversely spider. extending seats in its upper portion, bars In testimony whereof I have hereunto set extending between said arms and having my hand. Y their end portions resting in said seats and GEORGE F. SMITH. 

